GPS seems like magic — your phone knows exactly where you are within meters. Here's the elegant physics behind it: atomic clocks, triangulation, and a constellation of 31 satellites in medium Earth orbit.
GPS has generated $1.4 trillion in US economic value — here's how it works alongside Galileo, GLONASS, BeiDou, NavIC, and QZSS in 2026's six-system GNSS landscape.
